'You can design your own relationship': life inside an open marriage

Married couple Peter*, 46, and Liz*, 50, are sitting in their Melbourne home cuddling up with their long-term partners and laughing over a board game with their children and partners’ children on a Sunday morning.

“We were a vanilla couple from the suburbs,” Liz says describing their 20-year relationship, which took an unexpected turn four years ago when Peter was in remission from cancer and had a “seize-the-day moment”.